[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [PATCH 6/6] Introduce domain flag (dont_flush_iotlb) to avoid unnecessary iotlb flush.
>>> On 04.11.11 at 11:38, Jean Guyader <jean.guyader@xxxxxxxxxxxxx> wrote: > Add a domain level flag that will be check by the iommu low level code > to skip iotlb flush. iommu_iotlb_flush has to be called explicitly. > > Signed-off-by: Jean Guyader <jean.guyader@xxxxxxxxxxxxx> > --- > xen/arch/x86/mm.c | 12 +++++++++++- > xen/drivers/passthrough/iommu.c | 6 ++++++ > xen/drivers/passthrough/vtd/iommu.c | 6 ++++-- > xen/include/xen/sched.h | 1 + > 4 files changed, 22 insertions(+), 3 deletions(-) Neither the patch nor its description make clear what lock is used to protect this flag from having an effect on other but the current vCPU of the guest in question - I doubt that all other relevant code paths indeed use domain_lock(). Jan _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
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